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2 years ago

Solve the following:

Mathematics

2 answers:

12345 [234]2 years ago

7 0

The answer you are looking for is 2&2/12

WARRIOR [948]2 years ago

6 0

One and one half because you find a common denominator then subtract

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A researcher wishes to be 95% confident that her estimate of the true proportion of individuals who travel overseas is within 3%

andre [41]

Answer: a) 683 b) 1067

Step-by-step explanation:

The confidence interval for population proportion is given by :-

$p\pm z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}$

a) Given : Significance level : $\alpha=1-0.95=0.05$

Critical value : $z_{\alpha/2}}=\pm1.96$

Margin of error : $E=0.03$

Formula to calculate the sample size needed for interval estimate of population proportion :-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.2(0.8)(\dfrac{1.96}{0.03})^2=682.951111111\approx683$

Hence, the required sample size would be 683 .

b) If no estimate of the sample proportion is available then the formula to calculate sample size will be :-

$n=0.25(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.25(\dfrac{1.96}{0.03})^2=1067.11111111\approx1067$

Hence, the required sample size would be 1067 .

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2 years ago

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yarga [219]

I think it’s 7 hope this helps you

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3 years ago

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PIT_PIT [208]

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2 years ago

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Whats -3/1 simplified?

wolverine [178]

Answer:

-3

Step-by-step explanation:

You cannot simplify this question anymore, for it is already a whole number.

Steps:

-3/1

Eliminate the fraction bar and one...

-3

(Anything over one, is whole...so if I were to put 98384743/1, it would just be 98384743.)

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2 years ago

What graph represents the inequality y<2x-1

Black_prince [1.1K]

Answer:

See attached.

Step-by-step explanation:

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